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Ozone hole in North America during 1984 (abnormally warm, reducing ozone depletion) and 1997 (abnormally cold, resulting in increased seasonal depletion). Source: NASA [45] The Antarctic ozone hole is an area of the Antarctic stratosphere in which the recent ozone levels have dropped to as low as 33 percent of their pre-1975 values. [46]
The ozone hole was much more seen as a "hot issue" and imminent risk compared to global climate change, [13] as lay people feared a depletion of the ozone layer (ozone shield) risked increasing severe consequences such as skin cancer, cataracts, [23] damage to plants, and reduction of plankton populations in the ocean's photic zone. This was ...
Ground-level ozone ( O3 ), also known as surface-level ozone and tropospheric ozone, is a trace gas in the troposphere (the lowest level of the Earth's atmosphere ), with an average concentration of 20–30 parts per billion by volume (ppbv), with close to 100 ppbv in polluted areas. [ 1][ 2] Ozone is also an important constituent of the ...
The recovery of the ozone layer — which sits miles above the Earth and protects the planet from ultraviolet radiation — has long been celebrated as one of the world’s greatest environmental ...
Instead this year’s ozone hole was about average size for the last 20 years, even a bit smaller than 2022’s, according to NASA and the National Oceanic and Atmospheric Administration. From ...
Australia’s massive 2020 “Black Summer” bushfires, which injected nearly a million tons of soot and other particulate into the stratosphere, strengthened and prolonged a spinning hole in the ...
Retrospective video on the Montreal Protocol and the collaboration between policy-makers, scientists, and industry leaders to regulate CFCs. The Montreal Protocol on Substances That Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ...
With climate change, plastic pollution and a potential sixth mass extinction, humanity has made some incredible messes in the world. The post Cleaner Earth: Healing ozone hole, less smog, more ...